MiGMan's Flight Sim Museum < www.migman.com >
 TFX | by Digital Image Design

TFX: by Digital Image Design

HUD (Heads Up Display) from TXX, 1993

Memory Management

NOTE: The following information is for both the 3.5 floppy disk and CD-ROM versions of TFX.

TROUBLE SHOOTING

If TFX fails to install correctly, check that there is sufficient Hard Disk Space (CD-ROM version requires 6MBs of hard disk space, 3.5 floppy version requires 12 to 16MBs of Hard Disk Space).

Should you attempt to run TFX and the necessary swap file cannot be created you will be told.

Note that the Sound FX and Music will only be played through a Sound Blaster if your computer has 4MB (or more) of RAM available. If your RAM Free is between 2 to 4Mbs you can toggle between the two by entering the Main Configuration Menu of the game.

MEMORY MANAGEMENT

The game requires 570K free conventional memory, and at least 2 MB of RAM free to run. 4MB of RAM free required for sound and music. If your computer system has only 4MB of RAM Total it is impossible for your system to have 4 MB of RAM available because some must be used for other applications. Also, not all of this RAM is available for normal DOS usage. Only 640K is applicable to DOS and with the addition of mouse drivers, RAM disks, or disk cache programs this 640K soon gets used up. So, it is conceivable to have a system with 4 MB of RAM but only have 2 MB RAM free as well as only 510K conventional memory available for normal DOS usage.

You can determine how much memory is available in your system by typing MEM at the DOS prompt. This will report how much memory your system has, how much is free for DOS usage, how much RAM you have total, used, and free, how much EMS you have if activated, and how much is free. You will find a line called 'Largest Executable Program Size'. This line will show how much Conventional memory you have available.

HOW TO WIN MORE CONVENTIONAL MEMORY

The best way to free up more memory depends on what programs you have in your system. If you have DOS 6.0 or 6.2, use the memory optimizer called MemMaker. Simply type MEMMAKER at the DOS prompt and press Enter. MemMaker will alter your CONFIG.SYS and AUTOEXEC.BAT files to make your setup more memory efficient. MemMaker will try to load as much into high memory as possible. It will not remove TSRs loaded high. If after running MemMaker and confirming how much memory you now have, you still do not have enough conventional memory free, you should edit your CONFIG.SYS and AUTOEXEC.BAT files to avoid TSRs that cannot load high (type REM before the line which loads the TSR). Please refer to your DOS manual for more details on MemMaker and editing system files. Another way of freeing up conventional memory is to create a boot disk and use it to start your computer when you want to play TFX. A boot disk is a floppy disk which contains all the necessary information to start your PC, but does not include any additional drivers that are not needed to play the game.

The following process describes how to create a simple boot disk. This is not necessarily the best way to do this, but is the simplest. If you use a disk compactor such as Stacker or SuperStor, then you need to consult your manual on how to create a suitable boot disk.

You will need a blank floppy disk. This disk must fit into drive A of your computer. Once it is inserted, please type the following command:

Note: Some of these commands may take a while to execute. Please wait for the DOS prompt before typing in the next line.

FORMAT A:/S and press ENTER.

This will format the floppy disk in drive A and transfer the system onto it. Depending on the version of DOS you are running, you will be prompted to confirm that you wish to proceed with the format and asked to name the disk. After checking that the format command is about to format the disk in drive A (and not something else!) press Y to continue the operation. If asked for a name, type Boot Disk and press ENTER. You may be asked if you would like to format other disks. Type N to this question.

When you are back at the DOS prompt type the following line :

A: and press ENTER.

Note: NEVER MAKE A CHANGE AT C:\ >

When you type the following line, the DOS prompt will not reappear until you have completed the last step. This is normal.

COPY CON: CONFIG.SYS press ENTER
DEVICE=C:\DOS\HIMEM.SYS press ENTER
DEVICE =C:\DOS\EMM386.EXE RAM press ENTER
FILES=30 press ENTER
BUFFERS=30 press ENTER
DOS=HIGH,UMB press ENTER

Now hold down the CTRL key and press the Z key, when you get a ^Z, press ENTER. After pressing ENTER the screen should say 1 FILE COPIED.

Remember when you type the following lines, the DOS prompt will not reappear until you have completed the last step. This is normal.

COPY CON: AUTOEXEC.BAT press ENTER
PROMPT=$P$G press ENTER.
PATH=C:\DOS press ENTER.

Now hold the CTRL key and press the Z key, you should get a ^Z.
Press ENTER.
The boot disk is now complete, reboot your computer, type MEM and press ENTER, you should now have more than enough free memory.
The above process does not include installation of the mouse and CD-ROM drivers. Due to the huge variety of mouse and CD-ROM systems available it would not be possible to describe how to do this. The best option would be to find the CD-ROM drivers in your normal CONFIG.SYS and AUTOEXEC.BAT files and copy them to the appropriate file in your boot disk.

Note: If making a boot disk for TFX CD-ROM please refer to the following section on Copying TFX on to the Hard Drive.